Why Tomato Leaves Shrivel and Blooms Drop: Diagnosing the Problem

Symptoms: Shriveling Leaves and Failed Fruit Set

Your tomato plants started strong with plenty of blooms, but now leaves are shriveling, blossoms are dropping, and no fruit has formed. You've sprayed for mold and insects without success. This pattern suggests a few likely culprits.

Spider Mites: The Hidden Pest

Examine the undersides of leaves closely with a magnifying glass. Spider mites are tiny, often invisible to the naked eye, and thrive in hot, dry conditions. They suck sap from foliage, causing stippling, bronzing, and eventual leaf shrivel. A strong blast of water or insecticidal soap can help, but severe infestations may require miticides.

Fungal Diseases: Early Blight or Septoria Leaf Spot

Fungal pathogens cause leaf spots, yellowing, and defoliation from the bottom up. Humid weather and overhead watering accelerate spread. Apply a broad-spectrum fungicide (copper-based or chlorothalonil) at first sign, and improve air circulation by staking and pruning.

Root-Knot Nematodes: Below-Ground Damage

Microscopic nematodes infect roots, forming galls that impair water and nutrient uptake. Plants wilt during heat, show nutrient deficiencies, and decline progressively. Confirm by digging up a plant and inspecting roots for knots. Solarize soil, rotate crops, and use resistant varieties (marked "N" on labels) for future plantings.

Cultural Practices to Prevent Recurrence

• Water at soil level, not foliage.
• Mulch to maintain even moisture.
• Rotate nightshades (tomatoes, peppers, eggplant) yearly.
• Choose disease-resistant cultivars.